General
This product was designed and manufactured for Motorola SSTG. It allows
their new line of military radio transceivers to control peripheral
equipment in real time using either a 10/100 Base T or Fiber Optic
Ethernet link.
Technical
The External RF Controller is a PMC (PCI Mezzanine Card) design that
communicates with the radio transceiver via a PCI bus. It includes a
PCI bridge IC, a MPC860T PowerPC processor, 8 MBytes of Flash, 16
MBytes of SDRAM, serial EEPROM, a custom FPGA, and copper or fiber
optic Ethernet interfaces. In addition to passing Ethernet messages
between the host controller and external peripherals, this product can
format and transmit an Ethernet message in response to a changing
discrete signal faster than any product currently on the market. The
embedded software and gate array configuration are fully downloadable
via the PCI bus. This product is manufactured by HED in high volumes
for Motorola.
General
This product is used in conjunction with the External RF Controller
shown above. The "CIA" is used as the physical interface to control
legacy military radio equipment in real time.
Technical
The CIA employs an embedded controller system similar to the External
RF Controller. It features a wide variety of I/O to communicate with
current and future equipment including RS232, RS485, Ethernet, TTL I/O,
Open collector drivers, and "FLEX I/O". The FLEX I/O is a custom
programmable I/O signal that can swing between any logic high and low
voltages between -30 and +30 VDC. The design also includes a
reconfigurable FPGA to accomodate the interface to future equipment.
The embedded software and gate array configurations are fully
downloadable via the Ethernet bus. The design is expandable and
includes an interface to an optional daughter-card that can house any
circuitry necessary to support future interfaces that can not be
supported with the current suite of on-board I/O. The CIA can be
powered from AC mains or from 10-32VDC using an external power supply.
General
This product is installed into an RF Power Amplifier chassis to allow
the PA to communicate with the General Dynamics DMR (Digital Modular
Radio) system via the GDDS proprietary Ethernet interface. The PEP
(Programmable Ethernet Port) board is a proven low-risk approach for
new power amplifier vendors and has already been qualified as being
compliant with the GDDS specifications in terms of timing, frequency
hopping, and proprietary Ethernet message protocol. The PEP board works
with HF and VHF/UHF PA designs.
Technical
The PEP board contains a PowerPC processor, Flash, SDRAM, FPGA,
Ethernet, and DPRAM interfaces. The FPGA provides for filtering and
processing of Ethernet messages necessary to comply with the GDDS
timing requirements for frequency hopping power amplifiers. The PEP
board communicates with the PA controller via a DPRAM interface and can
be easily incorporated into most PA designs. The PEP board requires
external 3.3V and 5.0V power and HED can design it to fit nearly any
desired board outline.
Click
here to download the
'Ethernet PA Controller' brochure in PDF
format. (409 Kb)
General
This product helps evaluate the training of telephone operators or
telemarketers. The audio from up to three handsets is routed to the
TAMS unit and a central monitoring office can call the unit to listen
to any of the three handsets. Typically the monitoring office uses a PC
to autodial all of the deployed TAMS units and automatically record the
audio. That audio is then later evaluated to determine the effectivness
of the training of the operator.
Technical
The TAMS employs an embedded controller coupled with a telephone
interface and audio switching circuitry. Selecting the desired audio
channel is accomplished using DTMF signaling from the monitoring office.
General
This product helps real estate agents sell homes. The agent can record
a voice message describing the home for sale and the message is stored
into digital memory and is transmitted on the FM band to passing
automobile traffic. The interested home buyer tunes his car radio to
the frequency posted on the for-sale sign to hear the message.
Technical
This product is superior to competitors products because it replaces
the older unreliable tape loop with digital memory. This product
digitizes the message using CVSD encoding and stores the data into RAM.
A phase lock loop allows for precise setting of transmit frequency (88
to 108 MHz). A microcontroller handles all user input, PLL and CVSD
programming, and drives the 4-digit LED display. The RF power output is
kept low to allow FCC classification as an unlicensed transmitter. DC
Power is supplied by a Wall Cube whose power lead serves as the
transmit antenna.
General
The "TAG" is a motion detecting alarm system for laptop computers and
other high-dollar valuable items. It includes a keychain transmitter
and an alarm unit. Once armed, any motion will cause the alarm unit to
sound a piercing alarm tone that can only be reset using the keychain
transmitter.
Technical
The 315 MHz coded signal from the transmitter is decoded and validated
by an embedded microcontroller. If motion is detected while in the
armed state a 100 dB alarm tone is produced by a piezoelectric
annunciator. The wire tether attaches the alarm unit to the merchandise
and also serves as the receiving antenna. The alarm unit is powered by
a single AA battery which provides over 1 week of continuous use.
General
This product resides on the desk of the radio dispatcher for police,
fire, or public or private utilites and displays a four-digit numeric
ID of the person talking on the two way radio system. It is used to
uniquely identify each radio transmitter in the customers fleet of
vehicles or hand-held walkie talkies.
Technical
The ID1201 decoder processes the Motorola MDC1200 digital data burst
that accompanies the audio of the transceiver. A PIC processor is used
to decode the data stream and display the result on the four digit LED
display. The ID1201 also includes a Xilinx gate array to aid in data
decoding. The transceiver ID can also be sent to an optional printer or
serial port. The ID1201 contains an embedded real-time clock so that
the ID can be time and date stamped for printing.
For more information or to purchase this product, please visit www.controlsignal.com.
General
This product eliminates the need for the messy relief valve that expels
hydraulic fluid when the hydraulic actuator encounters a heavy load.
Technical
The ERV monitors the energy being consumed by the DC motor of the
hydraulic actuator and cuts off power if the motor load becomes too
great or if the integrated energy exceeds a preset threshold. The later
method of cut-off prevents motor overheating. The ERV is typically part
of a control system that includes actuator buttons (Extend and
Retract), a motor relay, and a DC power source such as a vehicle
battery. The wire supplying current to the motor is fed through the
circular torroid on the ERV which concentrates the induced magnetic
flux across a hall-effect sensor. The PIC processor monitors the hall
voltage which is in direct proportion to the current consumed by the
motor. The ERV will open the external motor relay if the load becomes
too great. The ERV can accomodate different sized motors from 20 to 100
Amps.
General
This product controls the electronic "shutter" of a high digital CCD
video camera used primarily for microscopy.
Technical
This product incorporates a processor, high speed gate array, and
precision D/A. The companion Windows based interface allows the user to
control the Image Intensifier Gate, Gain, and Gate Delay. The Gate
(shutter duration) can vary from 20nS to 1mS and can be delayed from an
external trigger input (Gate Delay) which can vary from 0uS to 2mS in
increments of 20nS. The Intensifer Gain can be set between 2500 and
80,000 foot-lamberts-per-foot-candle to equate to a 0V to 5V output.
For more information or to purchase this product contact www.VideoScopeIntl.com
General
This product was designed for wind tunnel applications to accurately
measure the amount of dust or dirt which might blow across a surface.
Technical
Comprised of an infared transmitter and reciever, this product can
measure dust density over a 80dB scale (ratio of 1-to-100e6). The
infrared transmitter LED can be either pulsed or on continuously and is
controlled by circuitry housed in an enclosure shown in the bottom of
the above photo. The receiver is based on a highly sensitive and large
aperature infrared photodiode paired with a low noise logarithmic
amplifier. The vertical tube in the assembly dispenses a known amount
of "dust" and the electronic system measures the "down-wind" dust
intensity.
For more information or to purchase this product contact www.cppwind.com
General
This device was developed for audio laboratories (and for university
physics laboratories) and allows the user to demonstrate the acoustical
properties of various materials. By placing a test material inside the
SWR resonance tube and measuring the standing wave minima and maxima,
the absorption properties of the test material can be determined.
Technical
The Audio SWR analyzer is comprised of two components: the electronics
module and the resonance tube. The electronics module contains a very
high fidelity sine wave generator which drives a speaker via a low
distortion amplifier. The speaker sets up a standing wave inside the
resonance tube where a movable microphone inside the tube can locate
the minima and maxima. The test sample is placed at the end of the tube
and, depending on its acoustical properties, changes the minima,
maxima, and phase when compared to a perfectly solid (reflective) test
sample. The signal from the microphone is processed prior to being
displayed on an analog meter. A microcontroller controls all frequency
setting, frequency counting, and 5 digit LED display updates.
General
This circuit board allows for custom processing of discrete I/O signals
in a Compact PCI computer system.
Technical
This product includes a Compact PCI interface and a custom gate array
which allows the user to process discrete I/O signals in a variety of
ways. It is housed on a PMC (PCI Mezzanine Card) circuit board and is
compliant with IEEE1386. This circuit board typically resides on a VME
form factor carrier.
General
This system allows two (redundant) computers to communicate on a single
RS232 interface. It overcomes the "one DTE per interface" limit by
incorporating bridge circuitry. The system can handle up to eight RS232
interfaces and is housed in a 19 inch rack mount panel.
General
This product was developed for a railroad remanufacturing company. This
circuit is part of a control loop which allows a PC computer to set the
current in an exciter coil of a DC generator.
Technical
This relatively simple analog circuit uses a precision current
monitoring technique and provides excellent linearity and temperature
stability. It is designed to be mounted inside the customers generator
control panel.
General
Built for the electric guitar industry, the "HeadRoom" product can
greatly enhance the artistic ability of the musician.
Technical
This device restores the dynamic range which is lost when an electric
guitar is played through a distortion box. It employs precision analog
multiplier circuitry which samples the raw guitar input and varies the
distortion box output accordingly. The ratio of input to output (the
slope of the response) is adjustable to accomodate user preferences.
Other controls allow for compatibility with all types of guitar pickups
and distortion box outputs.
General
This device was designed and mass produced for the United States Postal
Office and is part of a vehicle identification and location system.
Technical
This circuit contains a highly sensitive motion detector whose output
is processed by an 8 pin embedded microcontroller which implements a
custom filtering algorithm that reliably declares motion in a variety
of deployment situations (parked with engine running versus actual
driving). The output is used to enable power to a cellular data link
and GPS based vehicle tracking system. The circuitry includes
automotive regulators and surge supression devices to ensure reliable
operation in an automotive enviornment.
General
This product was developed for the countersurvellience industry and
will "buzz" the user when a UHF or VHF body wire transmitter is
operated nearby. It is the worlds first pager sized RF detector. Also
available in a discrete black plastic enclosure.
Technical
This device is a wideband RF detector and boasts the industry's best
sensitivity of -70 dBm at 500 MHz due to a logrithmic RF detection
scheme. It contains a microcontroller which handles duty cycling of the
receiver circuits, and can run for over 2 weeks on a single AA battery.
General
This product was designed for the electric utility industry. It allows
them to determine the phase (A, B or C) of an unknown overhead or
underground conductor in a three phase system. It is comprised of three
units; The Reference Unit, the Field Unit, and the Hotstick. The
Reference Unit gets installed (typically at a substation) on a
known-phase conductor (typically phase A). The Field Unit is the yellow
suitcase shown above and it is taken into the field where the utility
linemen touch the companion Hotstick unit to an unknown conductor. The
Hotstick sends wireless information to the Field Unit which in turn
communicates with the Reference Unit to display the phase of the probed
conductor.
Technical
The Field and Reference Units both contain GPS receivers which are used
to measure the exact time between the zero-crossings of the AC voltage
waveform, where the Field Unit is connected on a known-phase waveform
to compare it against the unknown-phase waveform probed by the
Hotstick. The Field and Reference Units employ cellular and landline
modems respectively to exchange the timing information. The system can
display which phase
(A, B or C) is being probed and also the phase angle information (in
degrees) on an LCD screen on the Field Unit. For safety considerations,
the Hotstick is an inherently "ungrounded" system where the electrical
path is completed to earth ground via the tiny capacitance which exists
between the Hotstick enclosure and the earth.The Hotstick contains
microprocessor based auto-ranging circuity which allows direct contact
with voltages from 120V to 365kV.
For more information or to purchase this product contact www.avistarinc.com.
General
This product was developed for Raytheon Technical Services and is used
to aid in upgrading their radar installations in Taiwan and Germany.
The I/O Transfer Panel is housed in a 1U rack mount enclosure and
allows the installer to reroute hundreds of signals and serial
interfaces using a jumper field.
General
This product is mounted to a generator control panel where it
continuously monitors the three phase generator output to determine
whether the stand-by generator successfully performed its periodic
auto-start self test. If the generator failed to start in the
prescribed interval an audible alarm is sounded and accompanying relay
is closed. The internal relay may be connected to a remote monitoring
system to alert maintenance personnel of the generator fault condition.
Technical
An embedded microcontroller samples the analog voltage output from the
generator and in addition to the generator start/no-start condition it
also serves as an undervoltage/overvoltage detector. The self test
interval is jumper programmable for 8/15/22/32 days and the expected
generator output is programmable for single phase or three phase
systems ranging between 120-480 VAC.
This product is currently manufactured by HED in high volume for
Transtar Products, Inc.
For more information or to purchase
this product
contact www.GeneratorVerifier.com.
General
The GSV300 represents a substantial technology improvement over the previous model, the GSV200. The new model features a large LCD display, easier setup, and greatly enhanced features. The GSV300 monitors a standby generator and determines whether it fails to perform it's periodic self-test. It works on any generator with voltage output between 120-480VAC and also works with “Low-RPM” or “Quiet” type generators.
Technical
This system contains an embedded microcontroller, real-time-clock, LCD display,
and analog signal conditioning. It samples the analog voltage output from the generator and utility to
determine whether the generator failed to perform it’s periodic self-test. The system also serves as a
voltmeter, frequency meter, oil change reminder, and run-time hours meter. It has four relay outputs
which can be connected to an external monitoring system to remotely inform the owner of generator health
and status.
This product is currently manufactured by HED in high volume for Transtar Products, Inc.
For more information or to purchase this product contact www.GeneratorVerifier.com.
General
This product was developed for a gas
and oil drilling company. The
circuit controls a latching solenoid which bleeds off accumulated water
when the water float switch reaches a predetermined height. The
solenoid open-to-close duration is adjustable between 1 and 20 seconds
using a potentiometer.
Technical
This circuit contains a DC/DC
converter, H-Bridge, and microprocessor.
The circuitry was designed to have extremely low power consumption and
will last for more than three years when powered from a standard 6V
alkaline lantern battery.
General
This product was developed for an
environmental engineering company.
The circuit converts the signal from an oxygen sensor to a 4-20mA
current loop signal for remote monitoring. The sensor zero and span are
adjustable using potentiometers.
General
This product was developed for a
medical
instrumentation company
specializing in urology. It upgrades their older ISA based data
acquisition board to a fully plug-n-play compatible PCI based design.
This board collects data from the clients “patient
unit” for display and analysis on a PC.
Technical
This data acquisition board features
16 channels of
analog input, each
with programmable gain and offset. An analog output plus a digital data
port and a one-shot output are used to interface with the customers
external Uropump. In addition to I/O circuitry this design includes a
68HC908 processor, a PCI interface chip, and a custom CLPD design.
On-board test signal generators and an audio monitoring port aid in
system installation and calibration, and a 32K FIFO ensures continuous
data transfer over the PCI bus. HED wrote a custom Windows device
driver and INF file conforming to WDF (Windows Driver Model) standards.
HED also supplied a custom Windows GUI to aid
in product testing and
evaluation.
For more information please contact www.life-tech.com.
General
This product measures the amount of
droop or
“sag”
on a high voltage power line. The amount of sag can be used to estimate
the conductor temperature so that the line capacity can be maximized.
Technical
Although HED did not originally
design this product,
HED was enlisted
to redesign the circuit boards internal to the Camera Unit and the
Datalogger Unit. The redesign effort drastically reduced the amount of
cabling and decreased the recurring cost of the product.
For more information, or to purchase this product please visit www.edmlink.com/sagometer.html.
| Urology System |
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General
This USB-based urology system allows physicians to quickly assess the mechanics of urinary flow and to diagnose abnormalities in voiding patterns. The HED-designed controller interfaces with uroflow and urovolume transducers, patient EMG sensors, can control a variety of fluid pumps and controls a catheter puller motor. This system complies with EN60601-1, EN60601-1-2, FCC, UL, CSA, and various other regulatory requirements.
For more information or to purchase this product contact www.Life-Tech.com.
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| Radar Transmitter Controller |
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General
This system was designed for NATO as an upgrade to part of their air defense radar network. . The Transmitter Control Unit (TCU) monitors, controls, and protects the klystron-based transmitter subsystem. This product is delivered as a finished equipment rack.
Technical
The TCU is based upon a custom data acquisition and control system paired with a COTS touch screen computer. The control system is comprised of custom digital, analog, and CPU boards all communicating over a custom backplane. An Ethernet interface provides communication between the control chassis, the touch screen PC, and an optional remote display/control console.
Radars by their nature are pulsed systems and the DSP-based analog cards can perform real-time capture-and-intercept any pulse which might stress the transmitter. The captured waveforms can be later recalled on the display during troubleshooting and maintenance operations. The digital cards monitor a myriad of input signals and can turn off power and RF to prevent damage during real-time fault conditions. The digital output signals are used for normal mode and test mode control of the transmitter subsystem.
A special built-in-test mode allows this system to fully control the transmitter during maintenance operations and a variety of front panel test points allow maintenance personnel to quickly analyze and debug transmitter problems.
The touch screen GUI allows for intuitive monitoring and control of the transmitter. The GUI shows a block diagram of the transmitter subsystem where each component becomes highlighted during fault conditions. Touching a block diagram component brings up a detailed list of status and faults which allows operators to isolate and debug problems down to the LRU level. The GUI also contains a history of status and faults which can be viewed locally or on an optional remote display/control console.
Although not shown in the photo, a half-rack-height door covers the control chassis and power supply during normal operation.
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General
This system was designed for the Taiwan Air Force (Republic of China) as a replacement for their legacy display and control consoles. It provides display of the air traffic and Electronic Counter Measures (ECM) threat environment, and allows for operation and control of the air defense radar system.
Technical
The system is composed of three components; a desk-configured display and control console, a server system, and an optional table-top console.
The lower display of the desk system shows the air traffic and missile-threat environment. It can display a map outline with range rings and allows the operator to pan and zoom to locate a particular aircraft or target of interest. In addition to showing the processed air traffic data it can also display up to six channels of “raw” or semi-processed radar video. It allows the operator to filter any combination of target speed, heading, height, and can filter the targets of interest from the sea and cloud clutter.
The upper display of the desk system shows the ECM (radar jamming) environment and allows the user to control all aspects of the air defense radar. The jamming environment can be shown in either 2D or 3D (jammer azimuth versus frequency versus amplitude). The upper display also contains window panes which allow for radar maintenance. One pane shows a block diagram of the radar system where an individual block becomes highlighted during fault conditions. Clicking on the individual block brings up detailed information regarding the subsystem status and faults. Another window pane allows special maintenance functions to be performed which allows operators to monitor radar performance and adjust parameters such as antenna alignment.
The Server Rack receives data from the radar system and feeds it to multiple display/control consoles. The server is based upon a Linux PC and the server can record and playback up to 90 days worth of air traffic data. This is useful in resolving disputes between civilian and military aircraft.
The table-top console replicates the functions of the upper display of the desk console and is typically located in a central air command center.
General
HED manufactures a variety of test fixtures and test “boxes” to support our in-house projects, or as separate projects where the test equipment is designed and built per customer specifications. Test systems can be basically passive (containing only switches, connectors, controls, etc) or active (containing custom circuit boards in addition to passive circuitry).
General
This circuit board is a good example of HEDs capability to reverse engineer and redesign obsolete circuit boards or systems. We address obsolescence issues and redesign using current technology (the circuit board shown above was originally a wire-wrap design comprising two separate circuit boards).
General
This device is a high precision, rack mount, 16 channel, USB-based strain gauge measurement and data logging system. The system features programmable DSP-based filtering of the strain gauge signal so that any customer-defined filter can be implemented.
Technical
Other features include a programmable strain gauge excitation voltage of 5V, 10V, or 20V with extremely small excitation ripple, and can accommodate any strain gauge between 350 and 2000 Ohms. The amplifier gain can be varied between 1 and 10000 in 1:2:5 step increments with the resulting noise being less than 20mVp-p at max gain of 10000. Any offset inherent to the strain gauge can be zeroed using coarse and fine offset adjustment controls.
BNC outputs of the pre-filtered signal allow for external signal filtering and an optional external sample rate clock can be injected for synchronization with other subsystems. The system employs industry standard XLR connectors for the strain gauge interface.
For more information or to purchase this product contact www.cppwind.com.
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